U+FFFC ￼ object replacement character, placeholder in the text for another unspecified object, for example in a compound document.

U+FFFD � replacement character used to replace an unknown or unrepresentable character

U+FFFE <noncharacter-FFFE> not a character.

U+FFFF <noncharacter-FFFF> not a character.

FFFE and FFFF are not unassigned in the usual sense, but guaranteed not to be a Unicode character at all. They can be used to guess a text's encoding scheme, since any text containing these is by definition not a correctly encoded Unicode text. The U+FEFF is Unicode's byte-order mark, named "zero-width no-break space" (as inclusion of it in text shall not be noticed). If this character is read in the wrong byte order (for example, due to an endianness bug), it will read 0xFFFE, which is illegal Unicode.

We use cookies to enhance your experience and to develop the site further. We never track you for monetary reasons. If you do not want this, you can either use the Do-Not-Track feature of your browser or opt out explicitly.